New vat dyestuffs of the dianthraquinonylamine-carbazole series



Patented Aug. 18, 1931' UNITED STATES PATENT OFFICE FRi'TZBAUMANN, or LEVERKUSEN-ON-THE-RHINE, GERMANY, ASSIGNOR'TO GENERAL ANILINE wonxs'mo, or NEW YORK, N. Y., A CORPORATION or DELAWARE NEW VAT DYES'IUFFS or THE nIANTHRreeuINcnYLAMINE-cAR-BAzonE SERIES Ito Drawing. Application filed April 4, 1930; SerialNo. 441,705, and in Germany April 9, 1929.

The present invention relates to new vat dyestuffs of the dianthraquinonylamine carbazole series.

I have found that valuable vat dyestuffs are obtainable by introducing into the amino groups of alpha-amino-, or alpha-alpha-diamino -,1.1" dianthraquinonylamine carbazoles one or two residues of an anthraquinone-,G-carboxylic acid. I

Themanufacture of my new dyestuffs may be performed according to various methods. For example, the alpha-amino-, or alphaalpha diamino-l.1-dianthraquinonylaminecarbazoles, which may be further substituted by monovalent substituents, such as aroylamino-, hydroXy-, alkoxy' groups or the like, are caused to react with an anthraquinone-B- carboxylic acid halogenide or a substitution product thereof, such as hydroxy-, alkoXy alkylthioether anthraquinone 2 carboxlic acid halogenides or the like, in the presence of a suitable high boiling organic solvent, such as nitrobenzene, at a temperature of about 150 C. This method generally yields the new dyestuffs in a simple manner and in a good state of purity. In some cases, however, another process of manufacture may be more advantageous; for example, 4.4-dia- 5 inino-Ll-dianthraquinonylaminemay first be condensed with an anthraquinone-B- carboxylic acid halide, carbazole ring formation of the intermediate product thus obtainable then being performed by heating with strong sulfuric acid. Furthermore, my

new products may be prepared by condensing an anthraquinonefi-carboxyl1c acid halide with an alpha-halogen-alpha-amino-anthraquinone, causing the reaction product to *be reacted upon by an "alpha-aminoanthraquinone in the present of a high boiling organic solvent, such as naphthalene, and of copper and an acid binding medium and performing carbazole ring closure of the dianthraquinonylamine thus formed with aluminum chloride and pyridine. In an analagous manner a-benzoylamino-B-anthraquin- OlY-oL-iLIlllDO 1.1- dianthraquinonylamine can bazoles can be prepared by condensing an alpha-benzoylamino alpha-halogen anthraquinone' with an alpha-alpha-diamino-anthraquinone, one amino group of which is substituted by the residue of an anthraquinone-fi-carboxylic acid, or vice versaby con- 'densing 'an alpha-alpha benzoylamino-aminoan'thraquinone with a ,8-anthraquinoylalpha-amino-alpha-halogen anthraquinone and treating the reaction" products with strong sulfuric acid to cause carbazole ring formation.

It may be ment1oned that the methods given above for the preparation of my new dyestuffs are not the only ones possible, but

that their manufacture may be performed according to any other method known for the preparation of acylainino-dianthraquinonylamine-carbazoles.

The new dyestuffs probably correspond to I l the general formula:

properties.

In comparison to the corresponding known benzoylamino dianthraquinonylamine carbazoles, my new products show the advantage that they dye lighter shadeswhich are almost waterproof, and yield'vats with comparative ease. As especially valuable in View of their dyeing properties have been found those of my new dyestuffs whiclrcontain the anthraquinone-,8-carboxylic acid residues twice in the molecule, or those which contain one anthraquinone-flcarboxylic acid residue and one benzoyl residue'in the molecule.

The following examples illustrate my invention without limiting it thereto, the parts being by weight.

E wample 1 6 parts of anthraquinone-B-carboxylic acid are suspended in 50 parts of dry nitrobenzene, l parts of thionylchloride are added and the mixture is heated to 100-120 C. while stirring for about 1 hour. Hereafter the excess of thionylchloride is distilled off by heating to about 150C, 4.5 parts of finely divided 4.l-diamino-l.1-dianthraquinonylamine are added and the mixture heated to 150160 C. for 3 hours.

As soon as no more unchanged starting material is present, the reaction mixture is cooled to about 100 C. and filtered at this temperature. A bluish-grey intermediate product is thus obtained difiicultly soluble in the usual organic solvents, easily soluble in strong sulfuric acid with a green coloration. It dyes cotton from an alkaline hydrosulfite vat grey shades.

This intermediate product is dissolved in sulfuric acid of 96% strength and heated to 2580 C. until the solution has become brown. By pouring the solution into water containing chromic acid or another oxidizing agent, olive-green flakes are obtained which dissolve in strong sulfuric acid with a reddish-brown coloration. The new product is almost insoluble in the usual organic solvents and dyes cotton from a brown alkaline hydrosulfite vat yellowish-olive shades of good fastness properties also to water. It probably corresponds to the formula:

(ITO

Ewample 2 10 parts of 5.5-diamino-1.1-dianthraquinonylamine-carbazole (obtainable by saponification of the corresponding 5.5-dibenzoy1- amino compound) are introduced into 200 parts of nitrobenzene and the mixture is heated to 150 C. until the water contained in the nitrobenzene has evaporated. Hereafter 12.5 parts of anthraquinone-2-carboxylic acid chloride are introduced at about 120 (1, the reaction mixture heated to 150160 C. for about 2hours and filtered by suction while still hot. There remains on the filter an orange-yellow powder, dissolving in boiling quinoline with the same coloration, in strong sulfuric acid with a blue coloration. It dyes cotton from a brown hydrosulfite vat orange-yellow shades of good fastness properties. It probably corresponds to the formula:

to I'm 0 l H c (IO/U a 1 EN 0 II I 0 @CI) ta 2% to o: c=o

Ewample fi lTIHDOCaHs I claim 1. The products of the probable general formula ll 9 l 0 EN NH.CO n E wherein a means one of the numbers 1 or 2, the NH group being linked to an alpha-position of the dianthraquinonylamine-carbazole nucleus, and wherein the different anthraquinone nuclei may be further substituted by monovalent substituents, said products forming red to black powders insoluble in alcohol, toluene and pyridine, soluble in strong sulfuric acid with red to blue colorations, dyeing cotton from an alkaline hydrosulfite vat strong orange to olive-green shades of good fastness properties.

2.- --The product of the probableformula' said product forming olive-green flakes dissolvlngl IIIStIOIlgSIllfLlIlC acld with a reddish-brown coloration, dyeing cotton from a brown hydrosulfite vat" yellowish-olive shades of good fastnessproperties.

3. The product of the probable formula:

said product forming an orange-yellow powder, dissolving in boiling quinoline with the same coloration, in strong sulfuric acid with a blue coloration and dyeing cotton froma brown hydrosulfite vat orange-yellow shades of good fastness properties. 4. The product of the probable formula:

i NH O 11 said product forming a brown powder, dissolving in hot quinoline with a. brown coloration, in sulfuric acid of 96% strength with a reddish-brown coloration and dyeing cotton from a brown hydrosulfite vat brown shades.

In testimony whereof, I aflix my signature.

FRITZ BAUMANN.

Certificate of Correction Patent No. 1,819,014. Granted August 18, 1931, to

FRITZ BAUMANN It is hereby certified that error appears in the printed specification of the abovenumhered patent requiring correction as follows: Page 3, between lines 101 to 125, claim 3, strike out the formula and insert instead o I EN NH o and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Oflice.

Signed and sealed this 20th day of October, A. D. 1931.

[SEAL] M. J. MOORE,

Acting Commissioner 0 1 Patents. 

